Internal-combustion engine



' 1,640,552 Allg. 30' 1927' v A. NELSON INTERNAL` COMBUSTION ENGINE Filed May l0. 1926 INI/ENTOR.l VfB/Vie ,4a wr AfL-50M A TToR/VEYS.

ibetented ug. 30, 1927.

omiso STM"Es` PATENT o-F'Fics.

VERNER AUGUST NELSON, or OAKLAND, CALIFORNIA.

INTERNAL-COMBUST'ION ENGINE.

Application led May 10,.

The present invention relates to improvements in internal combustion engines and has particular reference to those usingl a carburetor as chargel'orm-ing device, and

. in which charge isdrawn iii-tothe combus tion chamber of the engine from the carbur.

. control the port area ot the intake in accordance with the intensity of the draft caused by the suction ot' the engine. It isi further proposedto incorporate in such control means a means which allows atm0s` pheiie air to enter through the wall of the pipe whencve `the intensity. of the draft reaches a certain predetermined degree. It

Y the admiiztur'e ot atmospheric air intoith'e rtionately increased with an increase i f invent roce-eds. l Vl'he preferred torni oi" inylinvention ris illustrated in the'accompanying.drawing in which Figure 1 shows alongitudinalsection through a vfraginentary piece of intake pipe having my control'means attached thereto, substantially taken along line 1-1 otliigure 2, and Figure 2 an end view of the device substantially as seen from line 2 2 of Figure 1. i

`ii/l'hile I have shown only the preferred form of the invention, it should be understood that various changes vor modifications may be made within the scope of the claims hereto attached, withoutdeparting from the spirit of the invention.

is tui-ther proposed to provide means: where-y iarge automatically' and substantially l Further objects Aand 'advantages' ion willap'pear as the specitieay Y v spider 23 and has a nut 24 threaded on its 1926.' serial No. 108,026.

,also not shown. The pipe which is preferably rectangular in crosssect-io-n has a portion ot its upper face removed asshown at 5 and has its two. sides' extended upwardly toter-m` two.l slightly more'than semi-circular supporting elements 4- connected by a sectional drum face 6 extending into the pipe toiashort distance as shown at 7. A drum shapedfvalve 8 having two circular end pieces 9 is supported in the two bearing plates fl as at 11 and is formed withtwof apertures 12, and ldisposed yin the drum V face thereof on diametrically 'oppositesides Inthenormal position of. the valve, asiudicated` in lfull lines int Figure v1, the opening 12 is covered by vthe sectionpblr of theouter rim, and ai blad-'e 11i extends-trom the drum valve i to the pipe section 1 to reduce the port thereof'. Y To aid in the exact-'control ot the port area I provide a/ second bla-de 16 o-v spring materialtastened with one end to thek bottom ot the pipe section asy shown at 17 and htted at its upperemliny confronti-ng Vrelation to the blade 11i by means-ot' a screw 182. The exact port area suited for best condi-tions with the valve in the initial position shown.I in Figure 1,. may 'therefore be obtained-by adjusting the set screw 1S. Y

The second aperture 13 in the valve drum is adapted to Vbe closedby means ot a second valve 197guided by means of a sleeve 21 on the rod 2Q whichV latter passes through a to seat the valve V19and that the tension of the spring. may be adjusted by means of the nut 24, which latter serves at thesame time as a weight tending to hold the drum valve in the position indicated in full lines in Figure 1.

lThe operation of my invention is as follows Vhen the engine runs slowly and there is comparatively little draft in the intake pipe, my mechanism assumes the position indicated in'full lines in Figure 1 restricting the available port area yof the intake pipe to the narrow passageleft between the end of the Vblade 14 and the spring 16. The width of the Apassage may be adjusted byV operation of theset screw 18. isV closed and no atmospheric air may enter the intake pipe. Asl the draft increases the The valve at this timek blade 14 is pulled forward until gradually the passage increases as is indicated in the dotted line position. As the opening increases the valve also begins to open s o that 1- at a certain predetermined intensity of draft the latter to its initial position when theY draft ceases or decreases.

claim l. A control for the intake of an internal 5 of the pipe when the intensity of the draft rises to a predetermined degree, and a second spring-operated valve controlling air admitted through the opening for allowing a delicate adjustment to be effected.

2. A control for the intakepipe of an internal combustion engine comprising a drum valve pivoted to have a peripheral section extend into the pipe and a blade projecting from the drum surface into the pipe for reducing the port area thereof, the blade yielding to the draft in the pipe for increasing the port area thereof as the draft increases,

4and a port in the valve beginning to register with an opening in the wall of the pipe for admitting atmospheric air into the pipe when the draft reaches a predetermined intensity.

8. A control for the-intake pipe of an internal combustion engine comprising a drum valve pivoted to have a peripheral section extend into the pipe and a blade projecting from the drum surface into the. pipe for reducing the port area thereof, the blade yielding to the draft in the pipe for increasing the port area thereof as the draft increases, and the drum being formed withV opposing apertures, one of which is made to register with an opening in the pipe when the draft reaches a predetermined degree of intensity while a. spring operated valve controls the other aperture.

4. A control for the intake of an internal combustion engine. comprising a pivoted element extending into the pipe s0 as to reduce the cross-sectional area thereofand yielding to the draft of the engine in proportion to the intensity of the draft, a weight associated with the element and Ytending to oppose the action of the draft, a valve forming part of the said ele-ment and opening the pipev to atmospheric airat a predetermined intensity of draft and a second valve controlling the port area of the first valve.

5. A control for the intake of an internal combustion engine'comprising a pivoted element extending into the pipe so as to reduce the cross-sectional area thereof and. yielding to the draft'of the engine in proportion to the intensity of the draft, a weight associated with the element and tending to oppose thel action of the draft, a valve forming part of the said element and opening the pipe to atmospheric air at a predetermined intensity of draft and a second valve controlling the port area of the first valve and made adjustable by means ofthe weight.

6. A control for they intake of an internal combustion engine comprising arotary valve having an element extending into the'intakc to be operated by the draft passing therethrough, a second valve associated with a port opening of the first valve, and an adjusting element for the second valve arranged to yieldingly oppose operation of the first valve 'by the draft.

yIn testimony whereof I affix myV signature;

VERNER AUGUST NELSON. 

